Closure device for crystal converters



Dec. 14, 194s. w, NELSON cLosURE DEVIQE FR CRYSTAL CONVERTERS Filed sept. 22, 1944 with the innter surface of the portion 'of the T- shaped block in which the seat member is posiengaging and supporting the core member in said coaxial line.

3. In a crystal converter having a series connected crystal in a coaxial line, a core member in said coaxial line, a valve controlling an ultra high frequency input passage tothe coaxial line, and means for closing said passage comprising a cylindrical member having a seat formed thereon and positioned in the coaxial line, a cap member biased to engage said seat and close said passage,

j vmeans to hold the cap member out of engagetioned and the shoulder 44-formed onthe seat member extends a short distance inwardly to define an annular passage 41 coaxial with a chuck` ed tubular body portion 49 having extending Vtherefrom a plurality of spring lingers 50-50,

which are adapted tto slidably engage the conductor rod 24.

The cap member 46 is freely slidable in the tubular member 35, being normally urged Ito carry'its shoulder 45 into seating engagement with the shoulder 44 on the seat member 43 by a compression spring 55. An actuator rod56 is iixed to the capmember 46 by means of an insulating collar 51, wedged or molded in the end of the cap member and surrounding a portion of the rod 56. The actuator rod 56 may be moved to the right from the position shown in Fig. 2 tothe position shown in Fig. 1 to retract the cap member 46 to inoperative position, vthus opening the slot 31 to the coaxial system, comprising the conductor rod 24 and the walls of the crystal converter assembly which surround` the rod 24. Thus the tubular member 35, seat member 43 and cap member 46 comprise a valve mechanism which may be opened or closed to permit or block the passage of ultra high frequency input to the coaxial linewhich includes the coreconductor comprising the rod 24 and associated parts. v The actuator rod 56vmay be connected to anysuitable mechanism responsive to the generatorior the beat oscillator frequency, whereby, when the beat oscillator frequency generator is inoperative, the spring 55 will push the cap 46 from the position shown in Fig., 1 to thepositionshown in .Fig 2, thereby, blocking the ultrahighirequency gap or passage 31 and preventing stray` frequencies from reaching the crystal converter when the converter is not inoperating condition.

- What is claimed is:

1. In a crystal converter having a series connected crystal in a coaxial line, a valve controlling an ultra high frequency input passage to the coaxial line, and means for closing said passage comprising a cylindrical member having a seat'formed thereon and positioned inthe-coaxial line, a cap member biased to engage said seat and close said passage, and means to hold the cap member out of engagement with the seat when the converter is in use.

`2. In a crystal converter having a series connected crystal in a coaxial line, a core member in said coaxial line, a valve controlling an ultra high frequency input passage to the coaxial line, and means for' closing said passage comprisingr a cylindrical member having a seat formed thereon and positioned inthe coaxial line, a cap member biased to engage said seat and closesaid passage, means to hold the cap'member out of engagementwith the seat when the converter is 'operated, and means on said cap member for slidably ment with the seat when the converter is operated, and a sliding chuck on said cap member having contact fingers for slidably engaging the core member of saidy coaxial line and having surfaces for supporting said core member.

4. In a crystal converter, a tubular member having an ultra high frequency passage therein, a core conductor coaxially mounted with respect to said tubular member and contacting the crystal of the converter, a closure member slidably positioned in said tubular member to slide along the core conductor, means on said closure member for contacting and supporting the core member, a seat ring xed in said tubular member, and resilient means for urging the closure member to engage said ring to close the passage. 5. In a crystal converter, a tubular chamber, a core in said chamber and spaced from the walls thereof, an input passage communicating with said chamber, and means for closing said passage comprising a seat member fixed in said chamber and having an inwardly extending annular shoulder, a movable core supporting cap having an outwardly extending annular shoulder, and means for urging said cap to engage its annular shoulder with the annular shoulder of the seat member to seal said chamber from communication with said input passage. 1

6. In a crystal converter, a tubular chamber, a core coaxially mounted in said chamber, an input passage in communication with said chamber, and means for closing said passage vcomprising a seat member fixed inthe chamber, a movable core supporting cap slidable in said chamber, means forurging said capto engage the seat member to seal the chamber from communication withthe input passage, and contactor fingers on a cap for resiliently engaging saidcore member` in the various positions of the movable cap.

7. In a crystal converter, a tubular chamber, a. core having one end xedly positionedcoaxial with respect to said chamber, an input passage communicating with said chamber, and means for closing said passage comprising a cap member having a central core supporting section andslidably positioned in said chamber, an annular closure seat mounted in said'chamber for' env gagement by said cap member, means onsald' central core supporting section for resiliently contacting the core member, and means for urging said cap to engage said seat.

Wmun L, NELSON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS fl 

